Certified Healthcare Safety Professional (CHSP) Practice Exam

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What is the typical exposure limit (STEL) for formaldehyde?

0.5 ppm
1 ppm
2 ppm
5 ppm

The correct answer is: 5 ppm

The typical short-term exposure limit (STEL) for formaldehyde is set at 2 parts per million (ppm), which is the correct value established by various health and safety organizations. The STEL refers to the maximum concentration to which workers can be exposed for a short duration, usually 15 minutes. It is crucial in regulating workplace safety standards, as short-term high exposures to formaldehyde can lead to significant health issues including irritation of the eyes, nose, and throat, and potential long-term effects. The selection of 2 ppm as the STEL reflects both the toxicity of formaldehyde and the need to balance safety with operational requirements. By retaining such limits, regulatory bodies aim to minimize the risk of acute health effects while allowing for necessary use in industrial applications.